A lancing pen is a medical device commonly used by individuals with diabetes to obtain small blood samples for blood glucose testing. Lancet: A small, sharp needle that is inserted into the pen. Adjustable Depth Setting: Allows users to set the depth of the lancet's penetration based on skin thickness and personal comfort. Trigger Button: Releases the spring-loaded lancet to puncture the skin. Cap: Protects the lancet and helps set the penetration depth